think we were like most american who didn't have much involvement with gun violence, it had never touched our lives and we really weren't involved in the issue and didn't know a lot of the facts. i knew that there were a lot of deaths in the newspaper, and that many were attributed to guns, but i didn't really realize how big the problem was. i'll tell you, my son was sitting in french class in a small college town and he got shot four times. that, to me, makes it -- >> it could be anywhere. it could be a maul, it could -- >> anybody could get hurt at any time. >> colin goddard was shot four times in that virginia tech classroom and now works at the brady center to prevent gun violence. welcome, colin. thank you for your case. and coming on here to make it. you went undercover to buy guns. what did you learn? >> i learned it was pretty damned easy, chris. i learned, as long as you got the money, they'll sell you a gun. and if you go to a private seller, they're not going to ask you for i.d. or any paperwork or any background check, they're just going to be concerned with the 500 bucks they can make and that's about it.